Patent US3540012A successfully refreshed from Google Patents.
US3229171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary solenoid with improved air gaps and stop members
Assignee: Individual
•
Filing: 1963-08-12
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Granted: 1966-01-11
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Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Daugherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/14; H01F7/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A ROTARY SOLENOID THE COMBINATION OF A CORE OF MAGENTIC MATERIAL, SAID CORE HAVING A CENTRAL POLE MEMBER AND OUTER POLE MEMBERS, A ROTATABLE ARMATURE DISPOSED BETWEEN SAID OUTER POLE MEMBERS, MEANS INCLUDING A FRICTION-REDUCING BEARING SUPPORTING SAID ARMATURE ON SAID CENTRAL POLE MEMBER, THE END OF SAID CENTRAL POLE MEMBER BEING IN THE SHAPE OF AN ANNULUS, SAID ARMATURE HAVING AN ANNULAR RECESS FOR RECEIVING SAID ANNULUS OF SAID CENTRAL POLE MEMBER SO THAT THE AREAS OF THE ANNULAR AIR GAPS BETWEEN SAID ARMATURE AND SAID CENTRAL POLE MEMBER ON BOTH SIDES OF SAID ANNULUS ARE CONSTANT DURING ROTATION OF SAID ARMATURE, THE RADIALLY DISPOSED AIR GAPS BETWEEN SAID ANNULUS AND SAID ANNULAR RECESS BEING JUST
Claim 2
Dependent Claim
118 words
IN A ROTARY SOLENOID THE COMBINATION OF A CORE OF MAGENTIC MATERIAL, SAID CORE HAVING A CENTRAL POLE MEMBER AND OUTER POLE MEMBERS, A ROTATABLE ARMATURE DISPOSED BETWEEN SAID OUTER POLE MEMBERS, MEANS INCLUDING A FRICTION-REDUCING BEARING SUPPORTING SAID ARMATURE ON SAID CENTRAL POLE MEMBER, THE END OF SAID CENTRAL POLE MEMBER BEING IN THE SHAPE OF AN ANNULUS, SAID ARMATURE HAVING AN ANNULAR RECESS FOR RECEIVING SAID ANNULUS OF SAID CENTRAL POLE MEMBER SO THAT THE AREAS OF THE ANNULAR AIR GAPS BETWEEN SAID ARMATURE AND SAID CENTRAL POLE MEMBER ON BOTH SIDES OF SAID ANNULUS ARE CONSTANT DURING ROTATION OF SAID ARMATURE, THE RADIALLY DISPOSED AIR GAPS BETWEEN SAID ANNULUS AND SAID ANNULAR RECESS BEING JUST
References Cited (Backward Citations)
NL102130C
Cited
US3097316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |